Sewing-machine



4Sheets-Sheet 1. E. SHAW. Sewing Machine.

Patented Jul 27,1880.

INVENTOR. k a%a N. PETERS, PHDTO-LITHOGRAPHER, WASMINGIOILI, C.

4 SheetSh eet 2.

E; SHAW. Sewing Machine.

Patented July 27,1880.

WITNE S SE S.

INVENTOR.

N. PETERS. PHOTO-LITHOGR 4Sheets-Shee'o 3. E. SHAW.

Sewing Machine.

Patented July 27,1880.

INVENTOR.

,PETERs, FHn'm-LITHOGRAFHER. WASHINGTON, D C.

4 Sheets-Sheet 4.

E. SHAW.

Sewing Machine. I I No. 230,580. Patentedluly 27,1880.

WITNES SES N. PETERS. PMOTO-LIII'HOGRAFHIER, WASHINGTON D C.

Uivrrn TATEs PATENT FFICE.

ELIJ AH SHAW, OF MILWAUKEE, WISCONSIN.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 230,580, dated July 2'7, 1880.

Application filed July 28, 1879.

To all whom it may concern:

Be it known that I, ELIJAH SHAW, of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompa-Z nying drawings, forming part of this specifi-' cation, in which Figure 1 is a perspective view of a machine embodying my invention; Fig. 2, a detail view: of part of the mechanism for operating the presscr-foot; Fig. 3, an enlarged View of the take-up attachment, partly in section; Fig. 4, an enlarged view of my slide with needle and cast-off attachment in place; Fig. 5, a side view of part of the slide with needle and castoff mechanism removed; Fig. 6, top view of part of the slide; Fig. 7, needle-carrier with needles in place; Fig. 8, perspective view of the cast-off mechanism; Fig. 9, detached view of one of my cast-offs; Fig. 10, vertical central section of cast0ff mechanism; Fig. 11, cams and operating mechanism for operating the needles and slide, viewed from the rear. Fig. 12 is a detail view of the earn-grooved disks and arms for operating the shafts which actuate the slide and needles. Fig. 13 is a detail sectional view of a portion of the frame, showin g one of the bearings of the hollow shaft F and a portion of the lever F Fig. 14 is a detail view of the bearings of the hollow shaft. Fig. 15 is a vertical central section of the needle-bar and its carrier, showing the construction whereby the needle-bar is rendered vertically adjustable.

Like letters refer to like parts wherever they occur.

My invention has reference to machines particularly adapted for sewing tubular material; and it consists in certain constructions of devices and combinations pertaining to the needle carriers and holders, the castoffs and their holders, the presser-foot, and the mechanism for operating said parts, all as will hereinafter more fully appear.

I will now proceed to describe my invention more specifically, so that others skilled in the art to which it appertains may apply the same. A indicates a frame provided with an arm,

cured to the driving-shaft A are a series of disksthe first, A for operating the lever D s of the awls, the second, A for operating the central shaft, G and the third, A, for operating the hollow shaft F. Each of said disks A A A has upon its face a suitable groove to receive a friction-roll upon the lever or crank-arm of the shaft which it operates.

D represents the lever for operating the awl or awls. This lever is pivoted at cl, and extends down to and engages in a cam-groove, D in the disk A on the driving-shaft A where it is provided with a stud having a friction-roller. At the other end itis bifurcated, as shown at d, to grasp an arm, E, of a lug through which the awl-rod passes, substantially as in my reissued patent hearing date January 4, 1876, No. 6,843.

A is a disk having on its face a cam-groove, I

F, for imparting motion to the needle-operating mechanism. This groove receives a stud (provided with a friction-roller) on the arm I of the hollow shaft F, which has bearings K on the frame A, and is connected with the needles by a slotted arm, F lever F link F and a second lever, F which latter is bifurcated at d to grasp loosely'one end of a lug, L, by which the needle-carrier M is operated.

M indicates the needle-carrier. This carrier has a male dovetail, M, and works up and down in a female dovetail, P, in the slide P. The female dovetail is made larger than the male, so that a plate, 10, may be inserted between them on one side, and the parts wear away by constant friction they may be tightened by screws S S. Through a hole in the carrier M is inserted a needle-bar, N, which is preferably cylindrical and is held \by a setscrew, M which permits it to be adjusted vertically. .This set-screw M also passes through lug L, by which the needle-carrier M is operated. On its top the needle-barNis provided with holders a a for the needles. The holder a is rigidly attached to or forms a part of the needlc-bar N, and is provided with a hole in its top to receive the needle, and a second hole near its top, to receive a set'screw,*by*which the needleis retained in position. The holder at has also a horizontal arm or apron, 12 which is grooved to receive a corresponding arm or apron, M, of the holder at, which latter (n is slotted, as shown, and is bound to the arm or apron n by a set-screw, a.

The needle is held in the vertical arm of the holder at exactly as in the holder at. The slot in the arm of the holder it allows of its being adjusted laterally, with relation to the holder a, so that the needles may be placed either near together or far apart, as occasion may require.

The bar N, passing down into a round aperture in the carrier M. is adjustable vertically, and may beheld in any desired position by the set-screw M, which also holds the lug L to the carrier M.

The slide P is operated from the drivingshalt A by a disk, A having cam-groove G, and by mechanism of similar construction to that for operating the needlecarrier M, except that the shaft G is solid and passes through the hollow shaft F, coming out beyond the arm F after which it communicates to the slide 1 the motion given by the cam through links G G and intermediate lever, G.

By making the shaft F hollow and running the shaft Gr through it, I utilize space, and in makingone sh aftfurnish bearings for the other 1 get a more direct connection and a more symmetrical arrangement of parts.

The slide 1? supports the needle-carrier and cast-ofi' devices, and the horizontal reciprocation of the slide effects the feed of the material being sewed.

By the specified arrangement of the operating cams, shafts, levers, and links I am enabled to use an arm upon which I can readily slip the smallest boot-leg or other work upon which I may be engaged, can have access to the driving-shaft and cams without moving from my seat, and efi'ectually secrete and protect the mechanism for operating the needlecarrier and slide.

The cast-oft mechanism consists of a rod, 3, which forms part of a holder, 4. This holder is squared down on one side to make a projection or apron, 5, which is grooved to accommodate another holder, 6, having a corresponding projection or apron. Each of the holders has a ledge, 00 and as, respectively, and is grooved, as at y y. Between, and resting on the respective ledges w w, I place my cast-offs J J. I make these castoffs with a body of solid metal and a semi-cylindrical projection, j, of like material, slightly rounded at the top, in the concave sides of which projections the needle is intended to work. In the base of each which a dovetailed or tapering nut, j, on the off is bound to its holder. The dovetailed nuts j have also offsets or ribs, which fit in the grooves 3 y of the holders.

- The holder 6 is attached to the holder 4 by means of a tongue working in a groove and a screw-bolt passing through a slot, 7. By this means the two cast-offs may be adjusted with relation to the needles and to each other.

The base of each of the cast-oil's rests upon one of the ledges a; an, and is held firmly by the dovetailed nut, as before stated, so that while they may be moved backward and forward they cannot by any possibility be tilted so as to throw the projections j out of a perpendicular.

The rod 3 rests in a cylinder, T, in which it is capable of vertical adjustment, and is retained in any desired position to suit the needles by the set-screw q.

Upon the extreme end of the slide P, I pro vide a circular opening for the reception of the cylinder T. This opening is slotted at t to accommodate the arm q of the cylinder T. A binding-lug, t, controlled by a spring and setscrew, bears against the cylinder to give it the proper steadiness and to hold it in place against its weight. the opening t by a suitable bolt, to prevent the displacement of the cylinder.

An arm, g, on the cylinder T, serves to support a bar, V, which is enlarged at r to fit upon said arm. From the enlargement '0 project rods '2) c and upon these rods I place the adjustable lugs V V by which the motion of the needle-carrier is communicated to the castofl's. These lugs V V are held in place by set-screws, and maybe moved up and down to allow for their proper adjustment to regulate the throw of the castbtfs; and as the cylinder T is vertically adjustable independently of the adjustment for the throw just specified, and the cast-offs are also adjustable in their holders, it follows that any desired adjustments ot the castofi's can be had.

W represents a presser-foot, of about the construction shown in my patent before referred to, from which extends the usual bar. Near the top of the bar, and projecting from it, is a lug, W, which is notched to receive the end of the operating-lever W and a depressing-spring, W the rear end of which is attached to the frame by a bracket having lugs 8 and 9.

Depending from the operating-lever W and working loosely in it, is a rod, W which supports one end of a pivoted lever, W, in such position that the lever will be within reach of the roller-studs w w, with which the tappets 0 0 are provided. Said tappets 00 are attached to and revolve with the driving-shaft A Between a nut screwed on the top of the rod W and operating-lever W I place a coiled or rubber spring, W, which acts as a cushion to give steadiness and regularity to the motion of the parts and prevent vibration.

screw-bolt j works, and by which each cast- H represents a bracket, to which are at- A stop, t is held in the mouth of on the thread, preventing any entanglement on account of slack.

Upon the arm or neck 0, at its front end, is a shoulder, Z, and upon the frame, just above the bearing of the driving-shaft, is another shoulder, Z, for the reception of a work-table, when such a table is necessary.

By the use of the tappets c c the lever W rod W and spring W instead of the steady up-and-down motion gir'en by the cams usually employed, I get a sudden drop-motion of thepresser-foot, which tends to hammer and compress the material together as the stitch is being drawn up, thus making atighter seam, and this without undue vibration of the parts, as will occur if the cushion W is omitted.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is-

1. The combination, with the presser-foot and presser-bar, of an operating-lever, W and its depressing-spring, the rod W and cushion-spring W, the pivoted lever W and tappets for depressing said lever, and the drivingshaft to which the tappets are-attached, substantially as and for the purpose specified.

2. The combination, with the needle-carrier, of a needle-bar "errically adjustable in the needle-carrier and a needle-holder horizontally adjustable on the needle-bar, substantially as and for the purpose specified.

3. The combination, with a needle-carrier and needle-bar, of two needle-holders, said holders being vertically adjustable in the carrier, and one of said needle-holders being horizontally adjustable on its fellow, substantially as and for the purpose specified.

4. The combination of the needle-carrier, the needle-bar, vertically adjustable in the carrier, the lug L, and the set-screw, common to both the needle-bar and lug L, substantially as and for the purpose specified.

5. The combination of two cast-off holders,

said holders being vertically adjustable in the carrier and one of said holders being horizontally adjustable upon its fellow, substantially as and for the purpose specified.

6. The cast-oft holder having a ledge or shoulder for the reception of the base of the cast-off and a groove for the clamping-nut, in combination with acast-ofl'having a dovetailed slot, a dovetailed or tapering nut, and a bolt for securing the parts, substantially as and for the purpose specified.

7. The cast-off holder 4., having the grooved apron or projection 5, in combination with the cast-off holder 6, having a corresponding apron or projection, and a set-screw for securing and adjusting the .parts, substantially as and for the purpose specified.

8. In a sewing-machine, the combination of a cast-01f holder vertically adjustable in its carrier with a carrier having devices by which its throw can be adjusted, substantially as and for the purpose specified.

9. The'cylinder or cast-off carrier T, having an arm q, bar V, rods '0 '0 and adjustable lugs V V in combination with the needlecarrier M, provided with the lug L, substait tially as and for the purpose specified.

10. 1n aseWing-machine, two needle-holders, said holders vertically adjustable in their carrier, and one holder horizontally adjustable on its fellow, in combination with two cast-off 8o holders, said holders being vertically adjustable in their carrier, and one holder being horizontally adjustable on its fellow, substantially as and for the purpose specified.

11. The frame A, provided with the arm B and goose-neck O, in combination with theinclosed hollow shaft F, having bearings on the frame, levers F F and links F central shaft, G lever G links G G and mechanism for operating said parts, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 3d day of July, 1879.

ELIJAH SHAW. Witnesses:

JOSHUA STARK, S. S. S'roUT. 

